<template>
  <div class="q-pa-md">
    <q-table
      title="Treats"
      :data="rows"
      :columns="columns"
      row-key="name"
      :pagination="pagination"
    >
      <template v-slot:pagination="scope">
        <q-btn
          v-if="scope.pagesNumber > 2"
          icon="first_page"
          color="grey-8"
          round
          dense
          flat
          :disable="scope.isFirstPage"
          @click="scope.firstPage"
        />

        <q-btn
          icon="chevron_left"
          color="grey-8"
          round
          dense
          flat
          :disable="scope.isFirstPage"
          @click="scope.prevPage"
        />

        <q-btn
          icon="chevron_right"
          color="grey-8"
          round
          dense
          flat
          :disable="scope.isLastPage"
          @click="scope.nextPage"
        />

        <q-btn
          v-if="scope.pagesNumber > 2"
          icon="last_page"
          color="grey-8"
          round
          dense
          flat
          :disable="scope.isLastPage"
          @click="scope.lastPage"
        />
      </template>
    </q-table>
  </div>
</template>

<script>
export default {
  data () {
    return {
      pagination: {
        sortBy: 'desc',
        descending: false,
        page: 2,
        rowsPerPage: 3
        // rowsNumber: xx if getting data from a server
      },

      columns: [
        {
          name: 'desc',
          required: true,
          label: 'Dessert (100g serving)',
          align: 'left',
          field: row => row.name,
          format: val => `${val}`,
          sortable: true
        },
        { name: 'calories', align: 'center', label: 'Calories', field: 'calories', sortable: true },
        { name: 'fat', label: 'Fat (g)', field: 'fat', sortable: true },
        { name: 'carbs', label: 'Carbs (g)', field: 'carbs' },
        { name: 'protein', label: 'Protein (g)', field: 'protein' }
      ],

      rows: [
        {
          name: 'Frozen Yogurt',
          calories: 159,
          fat: 6.0,
          carbs: 24,
          protein: 4.0
        },
        {
          name: 'Ice cream sandwich',
          calories: 237,
          fat: 9.0,
          carbs: 37,
          protein: 4.3
        },
        {
          name: 'Eclair',
          calories: 262,
          fat: 16.0,
          carbs: 23,
          protein: 6.0
        },
        {
          name: 'Cupcake',
          calories: 305,
          fat: 3.7,
          carbs: 67,
          protein: 4.3
        },
        {
          name: 'Gingerbread',
          calories: 356,
          fat: 16.0,
          carbs: 49,
          protein: 3.9
        },
        {
          name: 'Jelly bean',
          calories: 375,
          fat: 0.0,
          carbs: 94,
          protein: 0.0
        },
        {
          name: 'Lollipop',
          calories: 392,
          fat: 0.2,
          carbs: 98,
          protein: 0
        },
        {
          name: 'Honeycomb',
          calories: 408,
          fat: 3.2,
          carbs: 87,
          protein: 6.5
        },
        {
          name: 'Donut',
          calories: 452,
          fat: 25.0,
          carbs: 51,
          protein: 4.9
        },
        {
          name: 'KitKat',
          calories: 518,
          fat: 26.0,
          carbs: 65,
          protein: 7
        }
      ]
    }
  },

  computed: {
    pagesNumber () {
      return Math.ceil(this.rows.length / this.pagination.rowsPerPage)
    }
  }
}
</script>
